B.Tech

Yes, you are eligible based on your experience and talent. No need to worry just go ahead with your vision and ideas and you will succeed.

Following are the top B.Tech lateral colleges in Pune:
1. College of Engineering Pune
2. MIT WPU
3. Vishwakarma Institute of Technology [VIT], Pune

Please also write about the state you belong to. Further, all the government engineering colleges have a very reasonable fee structure. Hence, prepare yourself accordingly for these colleges for B.Tech admission.

It is much difficult to get back the original documents from the college. You need to write an application regarding your documents and then submit the same to your college director or the principal.

Yes, you can. Please apply through state common entrance test cell. Maharashtra's website:
http://cetcell.mahacet.org/

Your case is different. You wants admission in 2nd year in other college on the basis of your first year B.Tech marks. So, few things must be clear here that admission in first year B.Tech programs in asked college are based on the basis of EAMCET ranks for 70% of seats. While 10% seats are for management/NRI quota and remaining 20% are for diploma engineers admits through the ECET.
So such transfer as you desired are done with in the colleges of same University. Hence if college for which you are seeking the admission in 2nd year is falling within the jurisdiction of same university, than your transfer can be possible otherwise not.

No, this won't be possible, as you must have appear for the entrance examination to eligible for the admission.

Hello,
To do B.Tech, you have to give the JEE or other entrance exam and therefore you cannot get admission in 2nd year B.Tech.

With this score, you cannot go to abroad for your further study. You can take some back up planning. Good luck.

You can take ECE in VIT, Vellore. This is the best institute among them. You can get good job from here and also they provide good facilities. Good luck.